SOLUBILIZER DESIGN FOR INTENSIFYING REMEDIATION OF SOIL WITH PETROLEUM HYDROCARBON POLLUTANTS
Several remediation technologies have been exploited and developed to remove petroleum hydrocarbons,a typical pollutant in the petrochemical industry.Bio-remediation has been considered an appropriate one to treat the in-service sites for its advantages in difficulty,cost,and security.Nevertheless,the application of this technology was still restricted by tedious periods and limited efficiency.Thus,4 kinds of solubilizers were designed and tested in this paper.To all solubilizers,the critical micelle concentration(CMC)was determined within 100～120 mg/kg and the corresponding surface tension was around 30 mN/m.In a typical soil-flushing process,the total petroleum hydrocarbons(TPHs)could be decreased from 27000 mg/kg to 4500 mg/kg or less by LIS-1,LAS-1,and LIS-2,and the TPH removal was proved to depend mainly on the ratio of solubilizers to the polluted soil.The intensification of the solubilizer was confirmed by the micro-biological degradation process,and the results were proved consistent with that of the soil-flushing process.Further,such consistency could help reduce the design period of more new types of solubilizers and improve the development efficiency of soil solubilization technology.
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